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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (C) 2008 The Guava Authors<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * Licensed under the Apache License, Version 2.0 (the "License");<a name="line.4"></a>
<span class="sourceLineNo">005</span> * you may not use this file except in compliance with the License.<a name="line.5"></a>
<span class="sourceLineNo">006</span> * You may obtain a copy of the License at<a name="line.6"></a>
<span class="sourceLineNo">007</span> *<a name="line.7"></a>
<span class="sourceLineNo">008</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * Unless required by applicable law or agreed to in writing, software<a name="line.10"></a>
<span class="sourceLineNo">011</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.11"></a>
<span class="sourceLineNo">012</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.12"></a>
<span class="sourceLineNo">013</span> * See the License for the specific language governing permissions and<a name="line.13"></a>
<span class="sourceLineNo">014</span> * limitations under the License.<a name="line.14"></a>
<span class="sourceLineNo">015</span> */<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>package com.google.common.collect;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import com.google.common.annotations.GwtCompatible;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import com.google.common.annotations.VisibleForTesting;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.io.Serializable;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.Collection;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.Iterator;<a name="line.24"></a>
<span class="sourceLineNo">025</span><a name="line.25"></a>
<span class="sourceLineNo">026</span>import javax.annotation.Nullable;<a name="line.26"></a>
<span class="sourceLineNo">027</span><a name="line.27"></a>
<span class="sourceLineNo">028</span>/**<a name="line.28"></a>
<span class="sourceLineNo">029</span> * An immutable collection. Does not permit null elements.<a name="line.29"></a>
<span class="sourceLineNo">030</span> *<a name="line.30"></a>
<span class="sourceLineNo">031</span> * &lt;p&gt;In addition to the {@link Collection} methods, this class has an {@link<a name="line.31"></a>
<span class="sourceLineNo">032</span> * #asList()} method, which returns a list view of the collection's elements.<a name="line.32"></a>
<span class="sourceLineNo">033</span> *<a name="line.33"></a>
<span class="sourceLineNo">034</span> * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; Although this class is not final, it cannot be subclassed<a name="line.34"></a>
<span class="sourceLineNo">035</span> * outside of this package as it has no public or protected constructors. Thus,<a name="line.35"></a>
<span class="sourceLineNo">036</span> * instances of this type are guaranteed to be immutable.<a name="line.36"></a>
<span class="sourceLineNo">037</span> *<a name="line.37"></a>
<span class="sourceLineNo">038</span> * @author Jesse Wilson<a name="line.38"></a>
<span class="sourceLineNo">039</span> * @since 2.0 (imported from Google Collections Library)<a name="line.39"></a>
<span class="sourceLineNo">040</span> */<a name="line.40"></a>
<span class="sourceLineNo">041</span>@GwtCompatible(emulated = true)<a name="line.41"></a>
<span class="sourceLineNo">042</span>@SuppressWarnings("serial") // we're overriding default serialization<a name="line.42"></a>
<span class="sourceLineNo">043</span>public abstract class ImmutableCollection&lt;E&gt;<a name="line.43"></a>
<span class="sourceLineNo">044</span>    implements Collection&lt;E&gt;, Serializable {<a name="line.44"></a>
<span class="sourceLineNo">045</span>  static final ImmutableCollection&lt;Object&gt; EMPTY_IMMUTABLE_COLLECTION<a name="line.45"></a>
<span class="sourceLineNo">046</span>      = new EmptyImmutableCollection();<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span>  ImmutableCollection() {}<a name="line.48"></a>
<span class="sourceLineNo">049</span><a name="line.49"></a>
<span class="sourceLineNo">050</span>  /**<a name="line.50"></a>
<span class="sourceLineNo">051</span>   * Returns an unmodifiable iterator across the elements in this collection.<a name="line.51"></a>
<span class="sourceLineNo">052</span>   */<a name="line.52"></a>
<span class="sourceLineNo">053</span>  @Override<a name="line.53"></a>
<span class="sourceLineNo">054</span>  public abstract UnmodifiableIterator&lt;E&gt; iterator();<a name="line.54"></a>
<span class="sourceLineNo">055</span><a name="line.55"></a>
<span class="sourceLineNo">056</span>  @Override<a name="line.56"></a>
<span class="sourceLineNo">057</span>  public Object[] toArray() {<a name="line.57"></a>
<span class="sourceLineNo">058</span>    return ObjectArrays.toArrayImpl(this);<a name="line.58"></a>
<span class="sourceLineNo">059</span>  }<a name="line.59"></a>
<span class="sourceLineNo">060</span><a name="line.60"></a>
<span class="sourceLineNo">061</span>  @Override<a name="line.61"></a>
<span class="sourceLineNo">062</span>  public &lt;T&gt; T[] toArray(T[] other) {<a name="line.62"></a>
<span class="sourceLineNo">063</span>    return ObjectArrays.toArrayImpl(this, other);<a name="line.63"></a>
<span class="sourceLineNo">064</span>  }<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span>  @Override<a name="line.66"></a>
<span class="sourceLineNo">067</span>  public boolean contains(@Nullable Object object) {<a name="line.67"></a>
<span class="sourceLineNo">068</span>    return object != null &amp;&amp; Iterators.contains(iterator(), object);<a name="line.68"></a>
<span class="sourceLineNo">069</span>  }<a name="line.69"></a>
<span class="sourceLineNo">070</span><a name="line.70"></a>
<span class="sourceLineNo">071</span>  @Override<a name="line.71"></a>
<span class="sourceLineNo">072</span>  public boolean containsAll(Collection&lt;?&gt; targets) {<a name="line.72"></a>
<span class="sourceLineNo">073</span>    return Collections2.containsAllImpl(this, targets);<a name="line.73"></a>
<span class="sourceLineNo">074</span>  }<a name="line.74"></a>
<span class="sourceLineNo">075</span><a name="line.75"></a>
<span class="sourceLineNo">076</span>  @Override<a name="line.76"></a>
<span class="sourceLineNo">077</span>  public boolean isEmpty() {<a name="line.77"></a>
<span class="sourceLineNo">078</span>    return size() == 0;<a name="line.78"></a>
<span class="sourceLineNo">079</span>  }<a name="line.79"></a>
<span class="sourceLineNo">080</span><a name="line.80"></a>
<span class="sourceLineNo">081</span>  @Override public String toString() {<a name="line.81"></a>
<span class="sourceLineNo">082</span>    return Collections2.toStringImpl(this);<a name="line.82"></a>
<span class="sourceLineNo">083</span>  }<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>
<span class="sourceLineNo">085</span>  /**<a name="line.85"></a>
<span class="sourceLineNo">086</span>   * Guaranteed to throw an exception and leave the collection unmodified.<a name="line.86"></a>
<span class="sourceLineNo">087</span>   *<a name="line.87"></a>
<span class="sourceLineNo">088</span>   * @throws UnsupportedOperationException always<a name="line.88"></a>
<span class="sourceLineNo">089</span>   * @deprecated Unsupported operation.<a name="line.89"></a>
<span class="sourceLineNo">090</span>   */<a name="line.90"></a>
<span class="sourceLineNo">091</span>  @Deprecated<a name="line.91"></a>
<span class="sourceLineNo">092</span>  @Override<a name="line.92"></a>
<span class="sourceLineNo">093</span>  public final boolean add(E e) {<a name="line.93"></a>
<span class="sourceLineNo">094</span>    throw new UnsupportedOperationException();<a name="line.94"></a>
<span class="sourceLineNo">095</span>  }<a name="line.95"></a>
<span class="sourceLineNo">096</span><a name="line.96"></a>
<span class="sourceLineNo">097</span>  /**<a name="line.97"></a>
<span class="sourceLineNo">098</span>   * Guaranteed to throw an exception and leave the collection unmodified.<a name="line.98"></a>
<span class="sourceLineNo">099</span>   *<a name="line.99"></a>
<span class="sourceLineNo">100</span>   * @throws UnsupportedOperationException always<a name="line.100"></a>
<span class="sourceLineNo">101</span>   * @deprecated Unsupported operation.<a name="line.101"></a>
<span class="sourceLineNo">102</span>   */<a name="line.102"></a>
<span class="sourceLineNo">103</span>  @Deprecated<a name="line.103"></a>
<span class="sourceLineNo">104</span>  @Override<a name="line.104"></a>
<span class="sourceLineNo">105</span>  public final boolean remove(Object object) {<a name="line.105"></a>
<span class="sourceLineNo">106</span>    throw new UnsupportedOperationException();<a name="line.106"></a>
<span class="sourceLineNo">107</span>  }<a name="line.107"></a>
<span class="sourceLineNo">108</span><a name="line.108"></a>
<span class="sourceLineNo">109</span>  /**<a name="line.109"></a>
<span class="sourceLineNo">110</span>   * Guaranteed to throw an exception and leave the collection unmodified.<a name="line.110"></a>
<span class="sourceLineNo">111</span>   *<a name="line.111"></a>
<span class="sourceLineNo">112</span>   * @throws UnsupportedOperationException always<a name="line.112"></a>
<span class="sourceLineNo">113</span>   * @deprecated Unsupported operation.<a name="line.113"></a>
<span class="sourceLineNo">114</span>   */<a name="line.114"></a>
<span class="sourceLineNo">115</span>  @Deprecated<a name="line.115"></a>
<span class="sourceLineNo">116</span>  @Override<a name="line.116"></a>
<span class="sourceLineNo">117</span>  public final boolean addAll(Collection&lt;? extends E&gt; newElements) {<a name="line.117"></a>
<span class="sourceLineNo">118</span>    throw new UnsupportedOperationException();<a name="line.118"></a>
<span class="sourceLineNo">119</span>  }<a name="line.119"></a>
<span class="sourceLineNo">120</span><a name="line.120"></a>
<span class="sourceLineNo">121</span>  /**<a name="line.121"></a>
<span class="sourceLineNo">122</span>   * Guaranteed to throw an exception and leave the collection unmodified.<a name="line.122"></a>
<span class="sourceLineNo">123</span>   *<a name="line.123"></a>
<span class="sourceLineNo">124</span>   * @throws UnsupportedOperationException always<a name="line.124"></a>
<span class="sourceLineNo">125</span>   * @deprecated Unsupported operation.<a name="line.125"></a>
<span class="sourceLineNo">126</span>   */<a name="line.126"></a>
<span class="sourceLineNo">127</span>  @Deprecated<a name="line.127"></a>
<span class="sourceLineNo">128</span>  @Override<a name="line.128"></a>
<span class="sourceLineNo">129</span>  public final boolean removeAll(Collection&lt;?&gt; oldElements) {<a name="line.129"></a>
<span class="sourceLineNo">130</span>    throw new UnsupportedOperationException();<a name="line.130"></a>
<span class="sourceLineNo">131</span>  }<a name="line.131"></a>
<span class="sourceLineNo">132</span><a name="line.132"></a>
<span class="sourceLineNo">133</span>  /**<a name="line.133"></a>
<span class="sourceLineNo">134</span>   * Guaranteed to throw an exception and leave the collection unmodified.<a name="line.134"></a>
<span class="sourceLineNo">135</span>   *<a name="line.135"></a>
<span class="sourceLineNo">136</span>   * @throws UnsupportedOperationException always<a name="line.136"></a>
<span class="sourceLineNo">137</span>   * @deprecated Unsupported operation.<a name="line.137"></a>
<span class="sourceLineNo">138</span>   */<a name="line.138"></a>
<span class="sourceLineNo">139</span>  @Deprecated<a name="line.139"></a>
<span class="sourceLineNo">140</span>  @Override<a name="line.140"></a>
<span class="sourceLineNo">141</span>  public final boolean retainAll(Collection&lt;?&gt; elementsToKeep) {<a name="line.141"></a>
<span class="sourceLineNo">142</span>    throw new UnsupportedOperationException();<a name="line.142"></a>
<span class="sourceLineNo">143</span>  }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span>  /**<a name="line.145"></a>
<span class="sourceLineNo">146</span>   * Guaranteed to throw an exception and leave the collection unmodified.<a name="line.146"></a>
<span class="sourceLineNo">147</span>   *<a name="line.147"></a>
<span class="sourceLineNo">148</span>   * @throws UnsupportedOperationException always<a name="line.148"></a>
<span class="sourceLineNo">149</span>   * @deprecated Unsupported operation.<a name="line.149"></a>
<span class="sourceLineNo">150</span>   */<a name="line.150"></a>
<span class="sourceLineNo">151</span>  @Deprecated<a name="line.151"></a>
<span class="sourceLineNo">152</span>  @Override<a name="line.152"></a>
<span class="sourceLineNo">153</span>  public final void clear() {<a name="line.153"></a>
<span class="sourceLineNo">154</span>    throw new UnsupportedOperationException();<a name="line.154"></a>
<span class="sourceLineNo">155</span>  }<a name="line.155"></a>
<span class="sourceLineNo">156</span><a name="line.156"></a>
<span class="sourceLineNo">157</span>  /*<a name="line.157"></a>
<span class="sourceLineNo">158</span>   * TODO(kevinb): Restructure code so ImmutableList doesn't contain this<a name="line.158"></a>
<span class="sourceLineNo">159</span>   * variable, which it doesn't use.<a name="line.159"></a>
<span class="sourceLineNo">160</span>   */<a name="line.160"></a>
<span class="sourceLineNo">161</span>  private transient ImmutableList&lt;E&gt; asList;<a name="line.161"></a>
<span class="sourceLineNo">162</span><a name="line.162"></a>
<span class="sourceLineNo">163</span>  /**<a name="line.163"></a>
<span class="sourceLineNo">164</span>   * Returns a list view of the collection.<a name="line.164"></a>
<span class="sourceLineNo">165</span>   *<a name="line.165"></a>
<span class="sourceLineNo">166</span>   * @since 2.0<a name="line.166"></a>
<span class="sourceLineNo">167</span>   */<a name="line.167"></a>
<span class="sourceLineNo">168</span>  public ImmutableList&lt;E&gt; asList() {<a name="line.168"></a>
<span class="sourceLineNo">169</span>    ImmutableList&lt;E&gt; list = asList;<a name="line.169"></a>
<span class="sourceLineNo">170</span>    return (list == null) ? (asList = createAsList()) : list;<a name="line.170"></a>
<span class="sourceLineNo">171</span>  }<a name="line.171"></a>
<span class="sourceLineNo">172</span><a name="line.172"></a>
<span class="sourceLineNo">173</span>  ImmutableList&lt;E&gt; createAsList() {<a name="line.173"></a>
<span class="sourceLineNo">174</span>    switch (size()) {<a name="line.174"></a>
<span class="sourceLineNo">175</span>      case 0:<a name="line.175"></a>
<span class="sourceLineNo">176</span>        return ImmutableList.of();<a name="line.176"></a>
<span class="sourceLineNo">177</span>      case 1:<a name="line.177"></a>
<span class="sourceLineNo">178</span>        return ImmutableList.of(iterator().next());<a name="line.178"></a>
<span class="sourceLineNo">179</span>      default:<a name="line.179"></a>
<span class="sourceLineNo">180</span>        return new RegularImmutableAsList&lt;E&gt;(this, toArray());<a name="line.180"></a>
<span class="sourceLineNo">181</span>    }<a name="line.181"></a>
<span class="sourceLineNo">182</span>  }<a name="line.182"></a>
<span class="sourceLineNo">183</span><a name="line.183"></a>
<span class="sourceLineNo">184</span>  abstract boolean isPartialView();<a name="line.184"></a>
<span class="sourceLineNo">185</span><a name="line.185"></a>
<span class="sourceLineNo">186</span>  private static class EmptyImmutableCollection<a name="line.186"></a>
<span class="sourceLineNo">187</span>      extends ImmutableCollection&lt;Object&gt; {<a name="line.187"></a>
<span class="sourceLineNo">188</span>    @Override<a name="line.188"></a>
<span class="sourceLineNo">189</span>    public int size() {<a name="line.189"></a>
<span class="sourceLineNo">190</span>      return 0;<a name="line.190"></a>
<span class="sourceLineNo">191</span>    }<a name="line.191"></a>
<span class="sourceLineNo">192</span><a name="line.192"></a>
<span class="sourceLineNo">193</span>    @Override public boolean isEmpty() {<a name="line.193"></a>
<span class="sourceLineNo">194</span>      return true;<a name="line.194"></a>
<span class="sourceLineNo">195</span>    }<a name="line.195"></a>
<span class="sourceLineNo">196</span><a name="line.196"></a>
<span class="sourceLineNo">197</span>    @Override public boolean contains(@Nullable Object object) {<a name="line.197"></a>
<span class="sourceLineNo">198</span>      return false;<a name="line.198"></a>
<span class="sourceLineNo">199</span>    }<a name="line.199"></a>
<span class="sourceLineNo">200</span><a name="line.200"></a>
<span class="sourceLineNo">201</span>    @Override public UnmodifiableIterator&lt;Object&gt; iterator() {<a name="line.201"></a>
<span class="sourceLineNo">202</span>      return Iterators.EMPTY_LIST_ITERATOR;<a name="line.202"></a>
<span class="sourceLineNo">203</span>    }<a name="line.203"></a>
<span class="sourceLineNo">204</span><a name="line.204"></a>
<span class="sourceLineNo">205</span>    private static final Object[] EMPTY_ARRAY = new Object[0];<a name="line.205"></a>
<span class="sourceLineNo">206</span><a name="line.206"></a>
<span class="sourceLineNo">207</span>    @Override public Object[] toArray() {<a name="line.207"></a>
<span class="sourceLineNo">208</span>      return EMPTY_ARRAY;<a name="line.208"></a>
<span class="sourceLineNo">209</span>    }<a name="line.209"></a>
<span class="sourceLineNo">210</span><a name="line.210"></a>
<span class="sourceLineNo">211</span>    @Override public &lt;T&gt; T[] toArray(T[] array) {<a name="line.211"></a>
<span class="sourceLineNo">212</span>      if (array.length &gt; 0) {<a name="line.212"></a>
<span class="sourceLineNo">213</span>        array[0] = null;<a name="line.213"></a>
<span class="sourceLineNo">214</span>      }<a name="line.214"></a>
<span class="sourceLineNo">215</span>      return array;<a name="line.215"></a>
<span class="sourceLineNo">216</span>    }<a name="line.216"></a>
<span class="sourceLineNo">217</span><a name="line.217"></a>
<span class="sourceLineNo">218</span>    @Override ImmutableList&lt;Object&gt; createAsList() {<a name="line.218"></a>
<span class="sourceLineNo">219</span>      return ImmutableList.of();<a name="line.219"></a>
<span class="sourceLineNo">220</span>    }<a name="line.220"></a>
<span class="sourceLineNo">221</span><a name="line.221"></a>
<span class="sourceLineNo">222</span>    @Override boolean isPartialView() {<a name="line.222"></a>
<span class="sourceLineNo">223</span>      return false;<a name="line.223"></a>
<span class="sourceLineNo">224</span>    }<a name="line.224"></a>
<span class="sourceLineNo">225</span>  }<a name="line.225"></a>
<span class="sourceLineNo">226</span><a name="line.226"></a>
<span class="sourceLineNo">227</span>  /**<a name="line.227"></a>
<span class="sourceLineNo">228</span>   * Nonempty collection stored in an array.<a name="line.228"></a>
<span class="sourceLineNo">229</span>   */<a name="line.229"></a>
<span class="sourceLineNo">230</span>  private static class ArrayImmutableCollection&lt;E&gt;<a name="line.230"></a>
<span class="sourceLineNo">231</span>      extends ImmutableCollection&lt;E&gt; {<a name="line.231"></a>
<span class="sourceLineNo">232</span>    private final E[] elements;<a name="line.232"></a>
<span class="sourceLineNo">233</span><a name="line.233"></a>
<span class="sourceLineNo">234</span>    ArrayImmutableCollection(E[] elements) {<a name="line.234"></a>
<span class="sourceLineNo">235</span>      this.elements = elements;<a name="line.235"></a>
<span class="sourceLineNo">236</span>    }<a name="line.236"></a>
<span class="sourceLineNo">237</span><a name="line.237"></a>
<span class="sourceLineNo">238</span>    @Override<a name="line.238"></a>
<span class="sourceLineNo">239</span>    public int size() {<a name="line.239"></a>
<span class="sourceLineNo">240</span>      return elements.length;<a name="line.240"></a>
<span class="sourceLineNo">241</span>    }<a name="line.241"></a>
<span class="sourceLineNo">242</span><a name="line.242"></a>
<span class="sourceLineNo">243</span>    @Override public boolean isEmpty() {<a name="line.243"></a>
<span class="sourceLineNo">244</span>      return false;<a name="line.244"></a>
<span class="sourceLineNo">245</span>    }<a name="line.245"></a>
<span class="sourceLineNo">246</span><a name="line.246"></a>
<span class="sourceLineNo">247</span>    @Override public UnmodifiableIterator&lt;E&gt; iterator() {<a name="line.247"></a>
<span class="sourceLineNo">248</span>      return Iterators.forArray(elements);<a name="line.248"></a>
<span class="sourceLineNo">249</span>    }<a name="line.249"></a>
<span class="sourceLineNo">250</span><a name="line.250"></a>
<span class="sourceLineNo">251</span>    @Override ImmutableList&lt;E&gt; createAsList() {<a name="line.251"></a>
<span class="sourceLineNo">252</span>      return elements.length == 1 ? new SingletonImmutableList&lt;E&gt;(elements[0])<a name="line.252"></a>
<span class="sourceLineNo">253</span>          : new RegularImmutableList&lt;E&gt;(elements);<a name="line.253"></a>
<span class="sourceLineNo">254</span>    }<a name="line.254"></a>
<span class="sourceLineNo">255</span><a name="line.255"></a>
<span class="sourceLineNo">256</span>    @Override boolean isPartialView() {<a name="line.256"></a>
<span class="sourceLineNo">257</span>      return false;<a name="line.257"></a>
<span class="sourceLineNo">258</span>    }<a name="line.258"></a>
<span class="sourceLineNo">259</span>  }<a name="line.259"></a>
<span class="sourceLineNo">260</span><a name="line.260"></a>
<span class="sourceLineNo">261</span>  /*<a name="line.261"></a>
<span class="sourceLineNo">262</span>   * Serializes ImmutableCollections as their logical contents. This ensures<a name="line.262"></a>
<span class="sourceLineNo">263</span>   * that implementation types do not leak into the serialized representation.<a name="line.263"></a>
<span class="sourceLineNo">264</span>   */<a name="line.264"></a>
<span class="sourceLineNo">265</span>  private static class SerializedForm implements Serializable {<a name="line.265"></a>
<span class="sourceLineNo">266</span>    final Object[] elements;<a name="line.266"></a>
<span class="sourceLineNo">267</span>    SerializedForm(Object[] elements) {<a name="line.267"></a>
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<span class="sourceLineNo">380</span>     * Returns a newly-created {@code ImmutableCollection} of the appropriate<a name="line.380"></a>
<span class="sourceLineNo">381</span>     * type, containing the elements provided to this builder.<a name="line.381"></a>
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<span class="sourceLineNo">383</span>     * &lt;p&gt;Note that each builder class covariantly returns the appropriate type<a name="line.383"></a>
<span class="sourceLineNo">384</span>     * of {@code ImmutableCollection} from this method.<a name="line.384"></a>
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<span class="sourceLineNo">386</span>    public abstract ImmutableCollection&lt;E&gt; build();<a name="line.386"></a>
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<span class="sourceLineNo">388</span>}<a name="line.388"></a>




























































</pre>
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